Re: NestList
- To: mathgroup at smc.vnet.net
- Subject: [mg50570] Re: NestList
- From: "Steve Luttrell" <steve_usenet at _removemefirst_luttrell.org.uk>
- Date: Fri, 10 Sep 2004 04:06:33 -0400 (EDT)
- References: <chpa26$jt6$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
You need to carry the counter along as part of the nesting process.
For instance
NestList[{#1[[1]] + 1, function[#1[[2]]]} & , {0, expr}, 5]
gives
{{0, expr},{1, function[expr]}, {2, function[function[expr]]}, {3,
function[function[function[expr]]]}, {4,
function[function[function[function[expr]]]]}, {5,
function[function[function[function[ function[expr]]]]]}}
Steve Luttrell
"Namrata Khemka" <namrata.khemka at gmail.com> wrote in message
news:chpa26$jt6$1 at smc.vnet.net...
> Hello everyone,
>
> I have a question regarding NestList function.
>
> I am applying a function on the expression n times.
>
> NestList [function, expr, n]
>
> However in my function I would like to know what is the current value
> of n. In other words I would like to know what iteration it is on.
>
> Is this possible?
>
> Thanks in advance.
>
> Namrata Khemka
>